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प्रश्न
In a biprism experiment, when a convex lens was placed between the biprism and eyepiece at a distance of 30 cm from the slit, the virtual images of the slits are found to be separated by 7 mm. If the distance between the slit and biprism is 10 cm and between the biprism and eyepiece is 80cm, find the linear magnification of the image.
उत्तर
Given : D = 10 + 80 = 90 cm, d = 30 cm, d1 = 90 - 30 = 60 cm
To find : Linear magnification (m)
Formula : Linear magnification `m=d_1/d="v"/u`
Calculation : From formula,
`d_1/d = "v"/u = 60/30`
∴ m = 2
The linear magnification of the image is 2.
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